The amount of water used to mix gypsum products is related to what factor?

The correct answer highlights that the amount of water used to mix gypsum products is influenced by the irregularity of gypsum particles. This factor is crucial because the surface area and shape of the particles directly impact how much water is required for a proper mix. Irregular particles can create more air pockets and may require a different water-to-powder ratio to achieve the desired consistency.

Using a blend with irregularly shaped particles might necessitate additional water to ensure that the mix is adequately hydrated and can achieve the necessary strength and workability. The hydration process is pivotal for activating the chemical reaction in gypsum, and maintaining the right water ratio is essential for the final product's quality.

While the size of the mixing bowl, the temperature of the water, and the type of gypsum used could potentially have some effect on the mixing process, they do not directly dictate the amount of water needed for the reaction and proper mixing consistency as strongly as the irregularity of the particles does.